i 36 MUSEO NACIONAL DE BUENOS AIEES. 



Obs. Species non rara etiam in fere tota Provincia bonaé- 

 rensi, adhuc cum Euxolo viridi (L.) Moq. confusa, amicis meis 

 sub nomine Euxoli vulgatissimi Sj)eg. commuuicata. 



Eadix albescens v. rubicunda crassiuscula subcarnosa teres 

 (5-15 cm long. = 3-5 mm crass.) laxe longequefibrilloso- bar- 

 bata; caules e eolio j^lnrimi prostrati sed non radicantes, sae- 

 pius apicem versus arcuatim adsurgentes, glaberrimi, in vivo 

 lenissime striati virides v. rubicundi, in sicco sulcati pallescen- 

 ti-virides (15-25 cm long. = 2-4 mm crass.). Folia confer- 

 tiuscula alterna, limbis rigidulo-membranaceis e viridi subci- 

 nerascentibus (praecipue ad hypophyllum)glaberrimis ovatis 

 V. lanceolatis (rariussuborbicularibus), ápice obtusissimis non 

 V. vix mucronulatis, margine planis integerrimis, basi sensim 

 V. abrupte cuneatis (5-20 mm long. = 2,5-18 mm lat.), pe- 

 tiolis limbo brevioribus (2-10 mm long.) dorso convexulis 

 ventre canaliculatis suffulta. Glomeruli inferi ad axillas fo- 

 liorum geminati sessiles v. subsessiles, saepius petiolo con- 

 spicue breviores, quandoque pauciflori (1-3-flori), quandoque 

 dichotomice multiflori, superi in racemo spiciforme simiolice 

 rarius breviter ramuloso breviusculo (3-6 cm long. = 5-7 

 mm crass.) deorsum saepe interrupto v. foliato congesti. 

 Flores pusilli (1,5 mm long.) sessiles, basi opposite bibrac- 

 teolati, bracteolis elliptico-subnavicularibus acutis (1 mm 

 long.) subhyalinis tenuiter viridi- carinatis, sepalis semi^er 5 

 spathulatis (1,5 mm long.) ápice obtusissimis minuteque 

 mucronulatis post anthesin parum accrescentibus, masculi 

 stamina 5 glabra, filamentis a basi liberis glabris albis, an- 

 tLeris flavis, foeminei ovarium ovatum vix e latere compres- 

 sulum tribus stigmatibus basi brevissime connatis coronatum 

 gerentes. Utriculus sublenticularis perianthio vix acerato 

 inclusus v. vix leniter ápice exertus (2 mm lat. et alt. = 

 1,25 mm crass.) fuscus, minute mgulosus, ápice mucrouatu- 

 lus; semen lenticulare margine acutiuscule rotundatum lae- 

 vissimum, atro-castaneum nitidissimum. 



478. Amarantus cristulatus Speg. = Speg., Plant. nov. nonn. 

 Amer. austr., n. 22, 



Hab. Non rarus in aridis sabulosis inter Rio Negro et Rio 

 Colorado, Febr. 1898 (C.S.). 



479. Amarantellus argentinas Speg. = Speg., 1. c, n. 21. 



Hah. Vulgatus ad viarum latera in Carmen de Patagones, 

 Febr. 1898 (C.S.). 



